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! | PED OUTPUT PRODUCT |
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!
! /data/charon4/smov/1044.prop
! Generated by PREPROCESSOR, version 7.0
! Date: Wed Dec 18 10:41:18 EST 1996
Proposal_Information
Title: NICMOS Grism Observations
Proposal_Category: GO
Scientific_Category: COSMOLOGY
Cycle: 7
Investigators
PI_Name: Joan Smith
PI_Institution: University 1
CoI_Name: John Brown
CoI_Institution: University 2
Contact:
Abstract:
Grism observations of a crowded field. Use of different telescope ROLL ANGLES
to deconvolve overlapping spectra. Use of the ACCUM readout.
Questions
Observing_Description:
The proposed science is to obtain spectroscopic observations of a
crowded field of compact objects (e.g., stars or distant galaxies),
with the grisms G141 and G206. Since the field is crowded enough that
individual spectra will overlap, observations at three different
telescope roll angles are performed, implying three separate visits
(in this example, the visits will be required to be 1 month apart
from each other). To locate each object in the field and identify each
spectrum, the grism observations are paired with images in the F150W
filter for G141 and in the F175W filter for G206. The G206 grism is
affected by the thermal emission from the telescope and saturates
after about 30 seconds. For such short exposures, the readout mode
ACCUM can be used, and multiple iterations of the exposures will be
performed to increase the signal-to-noise ratio. The number of reads
in the ACCUM mode is chosen to be NREAD=1, since the observations become
quickly background dominated. A dither pattern will take care of
background subtraction for not-too-crowded fields, for the F175W and G206.
Real_Time_Justification:
Calibration_Justification:
Additional_Comments:
Fixed_Targets
Target_Number: 1
Target_Name: HDF
Alternate_Names: Hubble Deep Field
Description: GALAXY,PROTOGALAXY
Position: RA=12H 36M 49.40S +/- 0.02S,DEC=62D 10' 58.0" +/- 0.7"
Equinox: J2000
RV_or_Z:
RA_PM: 0.0
Dec_PM: 0.0
Epoch:
Annual_Parallax: 0.0
Flux:
F(1.60)=0.00
Comments: The value of the flux is in units of Jy, at 1.6 microns
Solar_System_Targets
Generic_Targets
Scan_Data
Visits
Visit_Number: 01
Visit_Requirements:
On_Hold_Comments:
Visit_Comments:
Exposure_Number: 1
Target_Name: HDF
Config: NIC3
Opmode: MULTIACCUM
Aperture: NIC3
Sp_Element: G141
Wavelength:
Optional_Parameters: SAMP-SEQ=MIF2048,NSAMP=13
Number_of_Iterations: 6
Time_Per_Exposure: DEF
Special_Requirements:
Comments:
Exposure_Number: 2
Target_Name: HDF
Config: NIC3
Opmode: MULTIACCUM
Aperture: NIC3
Sp_Element: F150W
Wavelength:
Optional_Parameters: SAMP-SEQ=STEP128,NSAMP=10
Number_of_Iterations: 6
Time_Per_Exposure: DEF
Special_Requirements:
Comments:
Exposure_Number: 3
Target_Name: HDF
Config: NIC3
Opmode: ACCUM
Aperture: NIC3
Sp_Element: G206
Wavelength:
Optional_Parameters: PATTERN=SPIRAL-DITH,NUM-POS=4,DITH-SIZE=2.0,NREAD=1
Number_of_Iterations: 8
Time_Per_Exposure: 25.714 S
Special_Requirements:
Comments:
Exposure_Number: 4
Target_Name: HDF
Config: NIC3
Opmode: MULTIACCUM
Aperture: NIC3
Sp_Element: F175W
Wavelength:
Optional_Parameters: PATTERN=SPIRAL-DITH,NUM-POS=4,DITH-SIZE=2.0,SAMP-SEQ=STEP2,NSAMP=9
Number_of_Iterations: 3
Time_Per_Exposure: DEF
Special_Requirements:
Comments:
Visit_Number: 02
Visit_Requirements:
AFTER 01 BY 20 D TO 40 D
On_Hold_Comments:
Visit_Comments:
Exposure_Number: 1
Target_Name: HDF
Config: NIC3
Opmode: MULTIACCUM
Aperture: NIC3
Sp_Element: G141
Wavelength:
Optional_Parameters: SAMP-SEQ=MIF2048,NSAMP=13
Number_of_Iterations: 6
Time_Per_Exposure: DEF
Special_Requirements:
Comments:
Exposure_Number: 2
Target_Name: HDF
Config: NIC3
Opmode: MULTIACCUM
Aperture: NIC3
Sp_Element: F150W
Wavelength:
Optional_Parameters: SAMP-SEQ=STEP128,NSAMP=10
Number_of_Iterations: 6
Time_Per_Exposure: DEF
Special_Requirements:
Comments:
Exposure_Number: 3
Target_Name: HDF
Config: NIC3
Opmode: ACCUM
Aperture: NIC3
Sp_Element: G206
Wavelength:
Optional_Parameters: PATTERN=SPIRAL-DITH,NUM-POS=4,DITH-SIZE=2.0,NREAD=1
Number_of_Iterations: 8
Time_Per_Exposure: 25.714 S
Special_Requirements:
Comments:
Exposure_Number: 4
Target_Name: HDF
Config: NIC3
Opmode: MULTIACCUM
Aperture: NIC3
Sp_Element: F175W
Wavelength:
Optional_Parameters: PATTERN=SPIRAL-DITH,NUM-POS=4,DITH-SIZE=2.0,SAMP-SEQ=STEP2,NSAMP=9
Number_of_Iterations: 3
Time_Per_Exposure: DEF
Special_Requirements:
Comments:
Visit_Number: 03
Visit_Requirements:
AFTER 02 BY 50 D TO 70 D
On_Hold_Comments:
Visit_Comments:
Exposure_Number: 1
Target_Name: HDF
Config: NIC3
Opmode: MULTIACCUM
Aperture: NIC3
Sp_Element: G141
Wavelength:
Optional_Parameters: SAMP-SEQ=MIF2048,NSAMP=13
Number_of_Iterations: 6
Time_Per_Exposure: DEF
Special_Requirements:
Comments:
Exposure_Number: 2
Target_Name: HDF
Config: NIC3
Opmode: MULTIACCUM
Aperture: NIC3
Sp_Element: F150W
Wavelength:
Optional_Parameters: SAMP-SEQ=STEP128,NSAMP=10
Number_of_Iterations: 6
Time_Per_Exposure: DEF
Special_Requirements:
Comments:
Exposure_Number: 3
Target_Name: HDF
Config: NIC3
Opmode: ACCUM
Aperture: NIC3
Sp_Element: G206
Wavelength:
Optional_Parameters: PATTERN=SPIRAL-DITH,NUM-POS=4,DITH-SIZE=2.0,NREAD=1
Number_of_Iterations: 8
Time_Per_Exposure: 25.714 S
Special_Requirements:
Comments:
Exposure_Number: 4
Target_Name: HDF
Config: NIC3
Opmode: MULTIACCUM
Aperture: NIC3
Sp_Element: F175W
Wavelength:
Optional_Parameters: PATTERN=SPIRAL-DITH,NUM-POS=4,DITH-SIZE=2.0,SAMP-SEQ=STEP2,NSAMP=9
Number_of_Iterations: 3
Time_Per_Exposure: DEF
Special_Requirements:
Comments:
Data_Distribution ! Defaults indicated; change if desired
Medium: 8MM
Ship_To: PI_Address
Recipient_Email:
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